/*
 * Copyright 2014 Diogo Bernardino
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.db.chart;

import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;

public class Tools {

	/**
	 * Converts dp size into pixels.
	 * 
	 * @param dp
	 *            dp size to get converted
	 * @return Pixel size
	 */
	public static float fromDpToPx(float dp) {
		return dp * Resources.getSystem().getDisplayMetrics().density;
	}

	/**
	 * Converts a {@link android.graphics.drawable.Drawable} into
	 * {@link android.graphics.Bitmap}.
	 * 
	 * @param drawable
	 *            {@link android.graphics.drawable.Drawable} to be converted
	 * @return {@link android.graphics.Bitmap} object
	 */
	public static Bitmap drawableToBitmap(Drawable drawable) {

		if (drawable instanceof BitmapDrawable)
			return ((BitmapDrawable) drawable).getBitmap();

		Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
				drawable.getIntrinsicHeight(), Config.ARGB_8888);
		Canvas canvas = new Canvas(bitmap);
		drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
		drawable.draw(canvas);

		return bitmap;
	}

}
